Enhance some macro robustness.

p4raw-id: //depot/perl@19852

1 files changed, 4 insertions, 4 deletions

diff --git a/opcode.pl b/opcode.pl
index e5f6d3e7af..5a3beed671 100755
--- a/opcode.pl
+++ b/opcode.pl
@@ -90,10 +90,10 @@ print <<END;
 START_EXTERN_C
 
 
-#define OP_NAME(o) (o->op_type == OP_CUSTOM ? custom_op_name(o) : \\
-                    PL_op_name[o->op_type])
-#define OP_DESC(o) (o->op_type == OP_CUSTOM ? custom_op_desc(o) : \\
-                    PL_op_desc[o->op_type])
+#define OP_NAME(o) ((o)->op_type == OP_CUSTOM ? custom_op_name(o) : \\
+                    PL_op_name[(o)->op_type])
+#define OP_DESC(o) ((o)->op_type == OP_CUSTOM ? custom_op_desc(o) : \\
+                    PL_op_desc[(o)->op_type])
 
 #ifndef DOINIT
 EXT char *PL_op_name[];